Checking account earnings at Long's Bank are expressed by the equation,
I
=
−
0
.
06
x
+
8
.
3
.

The earnings at Fellow's Bank are modeled by
I
=
−
0
.
02
x
+
6
.
6
.

In both cases, x is the number of checks written.

For what range of checks will a checking account at Long's Bank generate more earnings income than one at Fellow's Bank? Show your work or explain how you got your answer.